期刊
CURRENT CANCER DRUG TARGETS
卷 6, 期 4, 页码 295-311出版社
BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/156800906777441753
关键词
MDR; P-glycoprotein; multidrug resistance-associated protein; inflammation; cytokines; ABC transporters; acute phase response; acute phase proteins
类别
Various mechanisms have been implicated in the development of resistance of cancer cells to chemotherapy. Multidrug resistance (MDR) is a phenomenon in which cancer cells are resistant to the cytotoxic effects of various structurally and mechanistically unrelated chemotherapeutic agents. One major mechanism by which this occurs is through the over-expression of ATP-dependent drug efflux transporters such as the P-glycoprotein (PGP) and multidrug resistance-associated protein (MRP). Regulation of MDR can occur at many levels including transcriptional, mRNA, protein and post-translational. In recent years it has been demonstrated that alterations in the expression and activity of the MDR transporters are seen in numerous tissues during an inflammatory response. An acute inflammatory response is associated with many conditions including infection, injury, hypoxia and stress and is known to result in the induction of several pro-inflammatory cytokines. Whether the function of cytokines can be harnessed in overcoming drug resistance of tumors has yet to be examined and explored. In this review. we will focus on the various studies investigating the regulation of MDR during an inflammatory response, in particular by cytokines. The mediators and pathways involved as well as the possible mechanisms of MDR regulation will be discussed. It is hoped that by understanding the clinical importance of inflammatory mediators in MDR, new doors will open and future insights will lead to the development of novel immunotherapeutics for the treatment of cancer.
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